Support Information:
Device Type: Modem / ISDN
Manufacturer: Boca Design,
Model: m3361
Interface: PCI / ISA
Operating System: Windows XP Home
Age of Device: Not specified
FCCID: eud 5u9 bri4035

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=2107&qa5=10&qa7=1500&dp=3&qm0=m3361&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Boca+Design%2C+Modem+%2F+ISDN++m3361+Windows+XP+ Home+eud+5u9+bri4035) | Research manufacturer Boca Design, (http://members.driverguide.com/index.php?action=getinfo&companyid=2107)

No Windows XP drivers were ever written for this ancient 33.6 kb/s modem. No driver development beyond Windows 9x.

Your only chance at making it work in Windows XP is by using drivers built into the os. ie: standard 33.6, Hayes 33.6, etc. try some and see if it works.